Transom is the result of a complete re-imagining of what a window fan should be. The air chamber abundantly draws fresh air from the outside in - or reverses electronically to exhaust stale air out. Powerful airflow circulation and comfort at half the height of conventional window fans, Transom is easy to install, blends elegantly into the space and preserves your view. Transom seals off windows 26 in. to 40 in. wide with the patented Soft-fit System that provides a sleek, satisfying and snug fit from end to end, without having to remove your screen. Transom - a new kind of window fan.. Ultra-powerful, low profile window fan. 4 speed touch controls. Electronic reversible fan/exhaust modes. Fits window openings that are between 26 in. to 40 in. wide. Super easy installation with patent-pending modular foam block system. Weather resistant enclosure. Extra-long 8 ft. grounded power cord. 5-year warranty. Auto mode with thermostat. Includes remote control. <a href=https://www.homedepot.com/c/electronics_recycling_programs style=color:#F96302 target=_blank>Click here for more information on Electronic Recycling Programs</a>. Fan diameter (in.): 26 in. Fan Diameter (in.): 26-30. Fan Features: Reversible. Height (in.): 7.16 in. Window Type: Double Hung. Fan Features: Remote Control. Power Type: Plug-In. Window Type: Single Hung